Investigation of varying louver angles and positions on cross ventilation in a generic isolated building using CFD simulation

Louvers are an integral component of natural ventilation. This study presents a numerical analysis using computational fluid dynamics (CFD) on cross ventilation in isolated building equipped with louvers. Opening configurations (i) center-center, (ii) top-top, (iii) bottom-bottom, (iv) top-bottom and (v) bottom-top (whereby the defined as ‘windward’-‘leeward’) varying louver No-Louver (NL), 0°, 15°, 30° 45° studied. Atmospheric Boundary Layer (ABL) condition is applied at inlet flow domain Renormalization Group (RNG) k-ε turbulence model enhanced wall function (EWT) employed for simulations. Grid sensitivity performed Convergence Index (GCI) whilst validation Factor two observation (FAC2) analysis. The highest dimensionless rate (DFR) achieved by configuration top-top without louvers 0.719. air exchange efficiency (AEE) obtained angle 15° center-center 53.4%. lowest AEE 0° 20%, indicating short-circuiting air. For bottom-bottom 30°, high but cost reduced DFR. optimal balance between DFR can be factor-optimization (α) presented this paper. concludes that opening position alongside plays role internal airflow, pressure coefficient, • Configurations symmetrical openings, cause Contrarily, improve mixing building. Highest 53.4%, meanwhile 20%. A higher not synonymous AEE. certain such 50.5% With mind, should prioritized configuration. Balancing tradeoff done factor-optimization, α shown